メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((131.363970119131 33.5688178708025, 131.363834007947 33.5688190090877, 131.36285200861 33.5687787419083, 131.362930540935 33.5679290319284, 131.364036071123 33.5680017950068, 131.363984243838 33.5685446477755, 131.363970119131 33.5688178708025)) ^^http://www.opengis.net/ont/geosparql#wktLiteral